Grate.



T. CRANEY.

GRATE.

APPLICATION FILED MAR. I6. 1917.

1 ,297,293. Patented Mar. 11, 1919.

2 SHEETS-SHEET 1L T. CRANEY.

GRATE. APPLxcATjoN FILED MAR.|6.1`9\7.-

1',297,293. Patented Mm. 11,1919.

2 SHEETSf-SHEET 2.

lll I 1s( Y. Il

UNITEDr` STATES -'PATENT OFFICE.

THOMAS CRANEY, OF BAY CITY, MICHIGAN.

GRATE.

' Specification of Letters Patent.

Patented Mar. 11, 1919.

Application led March 16, 1917. Serial No. 155,295.

One object of the invention is to provide a grate for use in furnacesadapted to burn refuse organic matter such as waste wood, saw-dust,garbage and other waste matter.

Another object is the provision of a grate having the maximum amount ofair space so that wet wood, refuse, garbage and other wet wastey mattercan be burned as readily as dry fuel.

With theseand other objects in view, the present invention consists inthe combinatio-n and arrangement of parts hereinafter more fullydescribed, illustrated inthe accompanying drawings, and particularlypointed out inthe appended claims, it being j understood that changesmay be made in the form, size, proportion and minor details withoutdeparting from the spirit or sacrificing any of the advantages of theinvention. y y

In the drawings Figure 1 is a. plan view of a furnace provided With mygrate.

Fig. 2 is a sectional side elevation of the same.

Fig. 3 is a detail of the grate bar.

Fig. 4 isv a side elevation thereof.

Fig. 5 is -a sectional view of the same.

Fig. 6 is a plan view of the grate bearing bar.

Fig. 7 is a side elevation thereof.

Fig. 8 is a sectional view of the same.

Fig. 9 shows the position of the grate bars when assembled.

Fig. 10 is a sectional view of the parts shown in Fig. 9 with arrowsshowing the course of the air, and the area of air space.

In the drawings, 1 indicates an ordinary refuse furnace provided withthe door 2 for the removal of ashes, and provided with my improvedgrate, indicated as a whole by the numeral 3. n

The grate 3 consists of a plurality of bearing bars 4 connected togetherat their inner ends by means of the conical cap member 5. The bearingbars are boltedor otherwise secured to said cap member, and radi-- atetherefrom in a downward direction, the lower ends of said bars beingsecured in any suit-able manner to a plurality of plates 6 secured inthe wall of the furnace. Thus a pyramidal shaped grate is formed asclearly shown in Fig. 2.

The bearing bars are reinforced throughout their length by means of thetie-rods 7 and are angular in cross section as shown in Fig. 8. Theseare stepped throughout their length as shown in Fig. 7 to provide aplurality of bearing faces 9, situated on each side of the apex 8 ofeach bar. Each bearing face 9 has a notch l() cut in the edge thereof.

A plurality of grate bars 11 are provided each having a rib l2 extendingfrom the lower side thereof, but terminating short of each end thereof..Extending from the upper sides of the said bars 11 are a plurality ofequally spaced lugs 13, extending across the wid-th of the bars.

In assembling my grate the ends of the ribs l2 of the grate bars 11 arereceived in the oppositely disposed notches 10 of the bearing bars 4whereby the free ends of each grate bar 11 are supported by the bearingfaces 9 of the bearing bar 4.' The edge of each grate bar overlaps theadjacent edge of the succeeding bar as shown in Figs. 2 and 10 andV byreason of the lugs 13, the said bars are spaced an equal distance from.each other. It will be apparent that beginning at the top, eachvsucceeding grate bur is longer than the preceding bar and theree by thelugs 13 which are equally spaced apart are out of alinement on adjacentbars, thus providing a. large area of air space between adjacent barsfor the circulation of air as shown by the arrows in Figs. 2 and 10. Byreason of the ends of the ribs l2 being received in the notches 10 thegrate bars 11 are securely held against displacement, while at the sametime thev can be easilv removed.

The aforementioned plates 6 located at the lower part of the grate areprovided with channels 14 running parallel with the lowermost grate bar11 and communicating by short channels 15, with a depression or shallowreceptacle 16. When burning garbage, the solder running from the gratebars 11 is conducted by means of the channels 14 and 15 into thereceptacles 16, where the same. can be removed by ladles or piped to anysuitable place.

From the foregoing it will be apparent that. l have provided a novelgrate possessing characteristics that enable it to be easilymanufactured, easily assembled and taken apart and one in which plentyof air circulation is provided, which air circulation is very essentialin grates used in the burning of wet refuse.'

What I claim is zl. A pyramidal grate for reuse burning furnaces,comprising a marginal base, a cap member located above the plane of thebase, inclined bearing bars secured at their ends to the marginal baseand cap member and radiating from the latter and provided at intervalswith seats and separate grate bars extending across the spaces betweenthe bearing bars and progressively decreasing in lengt-h toward thecenter of the grate and having their terminals removably arranged uponthe said seats.

2. A pyramidal grate for refuse burning furnaces, comprising a marginalbase having an opening and adapted to be mounted in the walls of afurnace, a centrally arranged cap member located above the plane of themarginal base, inclined bearing bars secured at their ends to the baseland the cap member and radiating from the latter, said bearing barshaving angnlarly related side portions or wings provided at intervalswith spaced seats and separate transversely disposed grate bars havingtheir ends removably arranged on the said seats, said grate barsprogressively7 decreasing in length from the marginal base to the capmember.

3. A pyramidal grate for refuse burning furnaces, comprising a marginalbase having an opening and adapted to be mounted in the walls of afurnace, a. centrally arranged cap member located above the plane si?the marginal base, inclined bearing bars secured at their ends to thebase and the cap member and radiating from the latter and provided atopposite sides with spaced Lopes of this patent may be obtained seats,said seats being provided at the side edges of the bearing bars withnotches and separate transversely disposed grate bars extending acrossthe spaces between the bearing bars and having their ends arrangedA uponthe said seat-s and provided with flanges engaging the notches anddetachably interlocking the grate bars with the said seats and holdingthe grate bars against lateral and longitudinal movement.

l. A pyramidal grate for refuse burning furnaces comprising a marginalbase, a conical cap member located above the plane of the base, inclinedbearing bars extending from the base to the cap member and radiatingtherefrom, said bearing bars being provided at their ends and at pointsintermediate of their ends with lugs located at the under side of thesaid bearing bars, the end lugs being secured to the marginal base andthe cap member, tie rods secured to the end lugs and arranged on theintermediate lugs to form a truss, and separate transversely disposedgrate bars removably supported at their ends upon the bearing bars.

5. A pyramidal grate for refuse burning furnaces comprising a basecomposed oli marginal plates connected together at their ends andprovided with depressions and having grooves extending inwardly from thedepressions, a cap member located above the plane of the said plates,inclined bearing bars radiating from the cap member ancL secured to thesame and to the said plates, and separate transversely disposed gratebars arranged upon the bearing bars and progressively decreasing inlength from the marginal plates to the cap member, said groovesterminating below the lowermost grate bars and said depressions beinglocated between the grate bars and the margin of the grate to aiieordaccess to the said depressions.

ln testimony whereof l aiiix my signature.

THOMAS CRANEY.

for ve cents each, by addressing the Commissioner of retenus,

Washington, IQ. G.

